Sweetwater Marsh NWR, Imperial Beach, California: This bit of salt-marsh habitat, just 315 acres, is all that's left of the huge salt marshes surrounding San Diego Bay. The refuge was developed as a result of a court-ordered settlement over a...

Tensas River NWR, Tallulah, Louisiana: The remnant bottomland-hardwood forest that makes up the terrestrial portion of Tensas River Refuge is home to the equally rare Louisiana black bear and Bachman's warblers. The aquatic portion comprises oxbow...

Parker River NWR, Newburyport, Massachusetts: Located as it is on a barrier island off the far northeast coast of Massachusetts, Parker River Refuge is a prime spot for birders. Its variety of coastal habitats offer habitat for such rarities as...

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Glossary
Species Status categories:
at- risk species — species of plants and animals that are
Federal candidate species and those that the Service
has not identified as candidate species, but are facing
threat( s) and are potential...